Elastic-fluid turbine



Sept ,1 5, I925. 1,554,052

' G. WEIDEHOFF ELASTIC FLUID TURBINE Filed March 27, 1925 N r L Inventor.

Georg Weidehoffl y MW His Attorney.

Patentedsept. 15, 1925.

UNITED STATES PATENT OFFICE.

GEORG- WEIDEHOFF, OI BERLIN, GERMANY, ASSIGNOB TO ALLGEMEINE ELEKTBI- CITKTS-GESELLSCHAFT, OI BERLIN, GERMANY.

[ ELASTIC-FLUID TURBINE. v

Application filed March 27, 1925. Seriat No. 18,859.

To all whom it may concern:

Be it known that I, Gnone WEIDEHOFF, a citizen of Germany, residing at Berlin, Germany, have invented certain new and useful Improvements in Elastic-Fluid Turbines, of

which the following is a specification.

. In connection with the construction of elastic fluid turbines, especially turbines of the reaction type, it is known to effect packing between the guide androtor blades by means of extending the covers for the blades axially whereby they pack against the adj acent blade bases.

The present invention relates to elastic 1 fluid turbines embodying a packing means of this character and has for its object to provide an improved construction and arrangement in such a turbine.

For a consideration of what is believed to be novel and the invention, attention is directed to the specification and the claims appended thereto.

In the drawing, the figure is a sectional view of a turbine structure embodying the invention.

Referring to the drawing, 1 indicates a turbine caslng or stator which carries rows of guide blades 2, and 3 indicates the turbine rotor which carries rows of blades 4.

Only afragment of the entire turbine is shown in the drawing, this being suflicient for the purpose of illustrating the invention. The parts illustrated represent any suitable turbine structure.

The covers for the rows of blades carried by the casing 01' stator are indicated at 5,

and it will be seen that in each instance they are extended axially as is indicated at 6 so as to pack against the bases of the next adjacent row of rotor blades. In a similar manner the covers 7 for the rotor blades are extended axially as is indicated at 8 so as to pack against the bases of the next adjacent row of stator blades. The extensions 6 and 8 project in opposite directions and in each instance are located on the admission sides of the rotor blade rows, this arrangement being advantageous in that it provides smooth passage walls for directing elastic fluid from the rows of guide blades to the rows of rotor blades. Also in each instance, the roots or bases of the blades are made of the same width as the body of the blades which has the advantage that the blades can further advantage that the extensions 6 and 8 are of maximum length whereby they may be made readily with sharp ed es and will have the maximum amount of e asticity.

Withan arrangement as described, it will be seen that the extensions 6 and 8 overlap each other so that in dismantling the turbine it is necessary that the rotor be moved axially a distance suflicient to bring the extensions 8 out of alignment with extensions 6 to prevent such extensions from striking each other when the upper half of the casing is raised. To insure that this is done,'there is provided an interlocking connection between the rotor and stator which only becomes released when the rotor has been moved relatively to the stator a distance suflicient to bring the extensions 8 and 6- out of overlapping relation. In the present instance, this interlocking connection is in the form of an axially extending ring 9 carried by the rotor and entering an annular groove 10 in an adjacent wall of the stator. As will be clear, the upper half of the turbine casing cannot be removed until the ro tor has been first moved axially to bring ring 9 out of groove 10 whereby at the same time, extensions '6 and 8 are moved from overlapping positions.

By the above described arrangement, the results are obtained that the blades can be manufactured at minimum cost because of the 'fact that their bases are of the same width as their bodies, that packing and elastic fluid flow conditions of the mosteflicient character are obtained, and that the possibility of injury to the packing means when the turbine is being dismantled is obviated.

What I claim as new and desire to secure by Letters Patent of the United States, is

1. An elastic fluid turbine comprising a stator, a rotor, rows of interleaving blades thereon, and covers for said blades having packing extensions, characterized by the fact that the bases for the blades are made of a Width substantially equal to the bodies of the blades and that the packing extensions are on the admission sides of the rotor blades and extend up to and pack against the bases of the blades in overlapping relation to each other, and that interlocking means is provided between the rotor and stator whereby the upper half of the stator cannot be reto bring the moved without first moving the rotor axially packing extension out of overlapping relation to each other.

2. An elastic fluid turbine comprising a stator, a rotor, rows of interleaving blades thereon, and covers for said blades having packing extensions, characterized by the fact that the bases for the blades are made of a width substantiall equal to the bodies 10 of the blades and that t e packing extensions are on the admission sides of the rotor blades and extend up to and pack against the bases of the blades in overlapping relation to eachother, and that the rotor and stator are provided with an axially extending interengaging ring and groove connection where- In witness whereof, I have hereunto set my hand this 11th day of March, 1925.

GEORG WEIDEHOFF. 

